Authenticated file upload via manipulated request headers
Published Oct 28, 2025 · Updated Oct 28, 2025
Unrestricted file upload in Yonyou U8 Cloud 5.1sp and earlier allows remote authenticated users to upload files through a servlet. The Request Header Handler in /service/NCloudGatewayServlet accepts manipulated ts and sign header values without adequate access control. A low-privilege account is required; the documented consequence is file upload, while file execution and downstream compromise are not established.
Summary
What happened
Unrestricted file upload in Yonyou U8 Cloud 5.1sp and earlier allows remote authenticated users to upload files through a servlet. The Request Header Handler in /service/NCloudGatewayServlet accepts manipulated ts and sign header values without adequate access control. A low-privilege account is required; the documented consequence is file upload, while file execution and downstream compromise are not established.
The record
- CVE
- CVE-2025-12344
- Published
- Oct 28, 2025
- Updated
- Oct 28, 2025
- Vendor
- Yonyou Network Technology Co., Ltd.
- Product
- U8 Cloud
- Classifications
- CWE-434, CWE-284, T1190
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Oct 28, 2025CVE publishedPublication date reported by the CVE source.
- Oct 28, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=2.0
- Affected versionversion=2.1
- Affected versionversion=2.3
- Affected versionversion=2.5
- Affected versionversion=2.6
- Affected versionversion=2.65
- Affected versionversion=2.7
- Affected versionversion=3.0
- Affected versionversion=3.1
- Affected versionversion=3.2
- Affected versionversion=3.5
- Affected versionversion=3.6
- Affected versionversion=3.6sp
- Affected versionversion=5.0
- Affected versionversion=5.0sp
- Affected versionversion=5.1
- Affected versionversion=5.1sp
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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